Talk about an attention grabber: An expectant mother explains how she and her husband were on the same page... until it came to circumcision. What follows is a funny, earnest 3-minute ping pong match about the pros and cons of the big snip. (Dad is pro; mom is con.) Spirited opinions come from all over: Doctors, therapists, anti-circumcision activists, men on the street, ladies in sex shops, even a cowboy on horseback (how's that now?). If the strength of a documentary is determined by its topic, Partly Private (premiering at Tribeca this week) should do well with the public.

Click here to watch other trailers from the Tribeca Film Festival: American Casino, Kobe: Doin' Work, My Life in Ruins, Love the Beast, or from movies in theaters this weekend -- The Soloist and Obsessed.